US2755570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavating machine
Assignee: BLACKBURN
•
Filing: 1953-02-16
•
Granted: 1956-07-24
•
Expires: 1973-02-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Blackburn
- 👤 Gordon R Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/086; A; A01; A01G; A01G23/00; A01G23/02; A01G23/04; A01G23/043; E02F3/10; Y; Y10; Y10T; Y10T83/00; Y10T83/707; Y10T83/7101; Y10T83/7108; Y10T83/7114
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1013173A
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US1485527A
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US1607784A
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US2086573A
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US2068984A
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US2410203A
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US2506662A
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US2648358A
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US2542952A
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US2630308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |